[Solved] Dynamic model for pie chart

[Emir]

Hi,

I am trying to use a dynamic model for pie chart and ajax binding but cant get it to work. I can't get this to load the chart. If I specify the type then it works fine.

This chart is in partial view and it will need to take care of ca 20 reports with different grouping options and I do not want to define a view for each one of them.

Please be gentle. Still a beginner. Thank a lot for your help.

@(Html.Telerik().Chart<dynamic>()
    .Name("ReportDataChart")
    .ClientEvents(events => events.OnLoad("onLoad_ReportDataChart")
        .OnDataBinding("ReportData_onDataBinding")
        .OnError("onError_ReportDataChart"))
    .Title("Report Data for:...")
    .Legend(legend => legend.Position(ChartLegendPosition.Left))
    .Series(series => {
          series.Pie("itemCount","Bucket")
              .Labels(labels => labels.Visible(true)
                  .Template(reportType.SeriesTemplate()))
          .Overlay(ChartPieSeriesOverlay.None);
      })
    .Tooltip(true)
    .DataBinding(dataBinding => dataBinding
          .Ajax().Select("LoadReportDataChart", "SRReports"))
)

[Daniel]

Hello Emir,

I reproduced the problem you wrote about. The member and category names aren't interpreted properly when the type is dynamic. We are still investigating how can this be fixed and I will write again once we have more information. A workaround for now is to set the names in the Pie SeriesDefaults and apply them in the OnLoad client-side event e.g.

.SeriesDefaults(defaults =>
  {
      defaults.Pie().Series.Member = "itemCount";
      defaults.Pie().Series.CategoryMember = "Bucket";
  })

function onLoad(e) {
    var chart = $(this).data('tChart');
    chart.options.series[0].field = chart.options.seriesDefaults.pie.field;
    chart.options.series[0].categoryField = chart.options.seriesDefaults.pie.categoryField;
}

All the best,
Daniel
the Telerik team

[Daniel]

Hello again Emir,

The problem occurred because the Chart attempted to get the names with an expression used on the model. I am glad to inform you that this is fixed and the changes will be included in next official release of the Telerik MVC Extensions.


All the best,
Daniel
the Telerik team